Natural Products Experiment Niki Robinson 10008562 Practical 2: Identification and quantification of taxifolin from milk thistle Aim: to Identify and quantify the amount of taxifolin from three samples Silymarin stock solution‚ taxifolin and silybum marianum extract. ` Methodology: Using auto-pipette (20-100 microlitre)‚ pipetted 0.06 mg of Taxifolin was added to 10ml conical flask and made up to the mark (10ml) with H2O.This procedure was repeated with the same amounts foe silymarin stock
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Level 1: Low Identification Fans that are characterized as low in identification may be attracted to the sport/team purely by the entertainment value of the product. It’s a relatively passive long-term relationship with low on emotion‚ low on involvement but a definite relationship exists. Level 2: Medium Identification This refers to an association with a sport or team that is based upon some attributes or elements found to be attractive. The level of identification for this fan base can be
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bath for 10 minutes. The aspirin was collected by vacuum filtration. After it dried‚ it yielded 0.93 g (30.9 % of original Panacetin). Isolation of Unknown: 71 mL of boiling H2O were poured int an Erlenmeyer flask with 0.93 g of unknown to dissolve it. After reaching room temperature‚ the flask was placed into a bucket with ice and DI H2O. The unknown was collected by vacuum filtration‚ rinsed with ice water‚ and dried to constant mass at 0.72 g. 13C NMR (100.13 MHz‚ acetone-D6): σ 15.5 (s‚ Me)
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Drugs are used everyday by people in many different ways for many different reasons. Drug testing has become a standard in pre-employment testing‚ because of the wide variety of drug use in today’s society. Drugs tested for by a possible employer include Cocaine (crack)‚ Amphetamines (crystal)‚ Opiates (codeine‚ morphine‚ heroin)‚ PCP (phencyclidine)‚ and Marijuana. Gas chromatography/mass spectrometry is used to test hair and urine samples of possible drug abusers or job applicants‚ and it is the
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we know that we know. There are known unknowns. That is to say there are things that we now know we don’t know. But there are also unknown unknowns. There are things we do not know we don’t know. So when we do the best we can and we pull all this information together‚ and we then say well that’s basically what we see as the situation‚ that is really only the known knowns and the known unknowns. And each year‚ we discover a few more of those unknown unknowns.” I would have told you that I thought
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Lillian Zhang AP Chemistry 3rd Period Formula of an Unknown Hydrate The purpose of the Formula of an Unknown Hydrate lab is to determine the weight percentage of H2O hydrated to an unknown salt and the empirical formula for the hydrated salt. To do this‚ a massed amount of the hydrate is heated over either a hot plate or Bunsen burner. This causes the water to be removed‚ leaving the anhydrous salt behind in the dish. The mass of the anhydrous salt‚ now with the absence of water‚ is less than
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Voter identification laws has been a controversial issue on whether or not it should be implemented in every state in America. 34 states have passed laws that required voters who registered to show a photo identification issued by the government before voting. This leaves only 16 states that do not require voters to have photo identification. The whole purpose of voter identification was to stop people from impersonating other people and fraud‚ but some people believe that voter identification can
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involves two oxidation-reduction reactions to calculate the oxidizing capacity of a sample of unknown bleach. In order to determine the volume of Na2S2O3 added‚ students will conduct a titration of bleach with thiosulfate with addition of a starch indicator to find the end point of the titration. Moreover‚ the oxidizing capacity of bleach is calculated with the percentage by mass of NaOCl in the unknown bleach sample. The overall chemical reaction throughout the experiment will be balanced with the
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many class lab days‚ I concluded my unknown was Calcium Carbonate due to results from the Flame Test and Anion I Test. Throughout our lab days‚ my friends would help me determine various odors and colors of the substances which allowed me to confirm my answer. Also‚ I looked select test results up on the internet to see if they matched my observations. On our first lab day‚ I received my bottle and noticed a white precipitate in the bottom therefore‚ my unknown was insoluble. I started my testing
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Determine the concentration of an unknown copper (II) sulfate solution by using colorimeter Introduction: The concentration of the solution also alterations the proximity of the solution. For example‚ the more focused concentration will frame to be denser than more weakened concentration of copper (ii) sulfate. This implies there is a connection between the concentration of an solution and its absorbance. Along these lines‚ this test is set up to discover the kind of connection between the concentration
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